Median doesn't tell me much because it doesn't describe the skewness of the distribution of incomes. Without looking, I bet that both: 1) max income is higher in MD than in WV 2) there are more people at higher incomes in MD than in WV
So I looked it up for MD [0] and WV [1] and while they don't really help with my conjectures, MD has a higher per capita income ($24,774 in WV vs $39,070 in MD) and lower poverty rate (19.1% in WV vs 9.3% in MD).
Also interesting to note from those sources that they have basically the same retail sales per capita and rate of persons without health insurance (although MD has about half the disability rate).
[0]: https://www.census.gov/quickfacts/MD [1]: https://www.census.gov/quickfacts/WV